(2+1)d Lattice Models and Tensor Networks for Gapped Phases with Categorical Symmetry
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| Format: | Preprint |
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2025
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| author | Inamura, Kansei Huang, Sheng-Jie Tiwari, Apoorv Schafer-Nameki, Sakura |
| author_facet | Inamura, Kansei Huang, Sheng-Jie Tiwari, Apoorv Schafer-Nameki, Sakura |
| contents | Gapped phases in 2+1 dimensional quantum field theories with fusion 2-categorical symmetries were recently classified and characterized using the Symmetry Topological Field Theory (SymTFT) approach arXiv:2408.05266, arXiv:2502.20440. In this paper, we provide a systematic lattice model construction for all such gapped phases. Specifically, we consider "all-boson type" fusion 2-category symmetries, all of which are obtainable from 0-form symmetry groups $G$ (possibly with an 't Hooft anomaly) via generalized gauging--that is, by stacking with an $H$-symmetric TFT and gauging a subgroup $H$. The continuum classification directly informs the lattice data, such as the generalized gauging that determines the symmetry category, and the data that specifies the gapped phase. We construct commuting projector Hamiltonians and ground states applicable to any non-chiral gapped phase with such symmetries. We also describe the ground states in terms of tensor networks. In light of the length of the paper, we include a self-contained summary section presenting the main results and examples. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_09177 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | (2+1)d Lattice Models and Tensor Networks for Gapped Phases with Categorical Symmetry Inamura, Kansei Huang, Sheng-Jie Tiwari, Apoorv Schafer-Nameki, Sakura Strongly Correlated Electrons High Energy Physics - Theory Mathematical Physics Quantum Algebra Quantum Physics Gapped phases in 2+1 dimensional quantum field theories with fusion 2-categorical symmetries were recently classified and characterized using the Symmetry Topological Field Theory (SymTFT) approach arXiv:2408.05266, arXiv:2502.20440. In this paper, we provide a systematic lattice model construction for all such gapped phases. Specifically, we consider "all-boson type" fusion 2-category symmetries, all of which are obtainable from 0-form symmetry groups $G$ (possibly with an 't Hooft anomaly) via generalized gauging--that is, by stacking with an $H$-symmetric TFT and gauging a subgroup $H$. The continuum classification directly informs the lattice data, such as the generalized gauging that determines the symmetry category, and the data that specifies the gapped phase. We construct commuting projector Hamiltonians and ground states applicable to any non-chiral gapped phase with such symmetries. We also describe the ground states in terms of tensor networks. In light of the length of the paper, we include a self-contained summary section presenting the main results and examples. |
| title | (2+1)d Lattice Models and Tensor Networks for Gapped Phases with Categorical Symmetry |
| topic | Strongly Correlated Electrons High Energy Physics - Theory Mathematical Physics Quantum Algebra Quantum Physics |
| url | https://arxiv.org/abs/2506.09177 |